Frost King 16"x3/4"x48" Fiberglass Handy Utility Insulation Roll. Made from safe fiberglass, it is asbestos-free, fire retardant, and heat absorbent. This versatile roll can be used on heating and cooling pipes, ducts, auto hoods, and trunks. It creates an insulating barrier that retains heat or cold, seals out weather, and damps vibration. Florida FL17244 approved and ICC-ES 3455 listed.